Hydraulic valve



Sept. 1, 1925. 1,552,331

J. E. MILLARD HYDRAULI C VALVE Filed April 24, 1922- 3 Sheets-Sheet 1J21 mk/lmrn Sept. 1,1925.

J. E. MILLARD HYDRAULIC VALVE Filed April 24, 1922 3 Sheetg-Shoet 2 gmwSept. 1, 1925.

J. E. MILLARD HYDRAULIC VALVE 3 Sheets-Sheet 3 Filed April 24, 1922 h a1, I If 7 m2 6 I I 3 I Fills N A w 1%. m w 0 i i 1 Ill 6 6 h l w 9 I. 9F 2 MW 4 1 W HI II..H|H| M I l "H a Patented Sept. 1, 1925.

Joan E. MI L-Ann, or ron'rsmou'rn, omo.

HYDRAULIC VALVE.

Application filed April 24, 1922. Serial No. 556,293.

and useful Improvements in Hydraulic,

Valves, of which the following is a specification.

This invention appertains to certain im'-.

provements in valves generally, and more particularly to a type of thesame for controlling the admission and exhaust of water from. thecylinder or cylinders of hydraulic motors and the like.

The principal object of the invention is to provide for a valve of theclass mentioned, and one of a mechanically refined construction andarrangement whereby, to greatly facilitate the proper admission andexhaust of water to andfrom the cylinder or cylinders of hydraulicmotors and the like, and to otherwise increase the efficiency ofoperation of such motors.

Another object of the invention is to provide for a valve ashereinbefore characterized, and one involving a novel formof valveoperated mechanism of a nature and design to be readily adapted for usein connection with a two-way, a three-way, or a four-way valve, andwherein to operate in a manner to affect an openingof the exhaust valveor valves slightly in advance of the opening of the admission valve orvalves.

WVith the foregoing and other objects view, the invention resides in thecertain novel and useful construction, arrangement and operation ofparts as will be hereinafter more fully described, set forth in theappended claims, and illustrated in the accompanying drawings, in whichz- Figure 1 is a vertical longitudinal section taken on the line 11 ofFig. 2,

Fig; 2 is atop plan view, partly in section, and, r

Fig. 3 is an end elevation, partly in section.

Referring to the drawings, the numeral 10 designates the valve body inits entirety, and the" same comprises a casting formed toprovide anadmission chamber 11 and an exhaust chamber 12 disposed in spacedparallel relation one with respect to the other, and transversely of thelower side of the body, and a pair of upper chambers 13 and 14 disposedside by side longitudinally of the upper side of the body with theiropposite ends overlying the admission and eX- haust chambers 11 and 12.The lower chambers 11 and 12 are separated from the upper chambers 13and 14 by means of an integral horizontal wall 15, and the latterchambers one from the other by means of an integral vertical wall 16. w

Opening through the lower walls of the admission chamber 11 are a pairof spaced openings which are normally closed by screw plugs 17 and 18,which, when the latter are removed from position, admit of the threadingof the removable valve'seats 19 and 20 upwardly of admission; portsformed in the integral horizontal wall 15' and opening into the upperchambers 13 and 14, respectively. Cooperative with these valve seats 19and 20' are downwardly'opening valves 21 and 22, respectively, and thesame are'normally tensioned in closed position by means of coiledsprings 23 and 24 which have their lower ends seated in inwardly openingbores formed in the screw plugs 17 and 18, and their upper ends engagedoverthe lower ends of the valve rods or stems 25 and 26, and bearingdirectly against the un'dersides of the valves. The valve rods orstems25 and 26 project upwardly through the valve seats 19 311C120 andthrough'openings formed vertically through the top wall 27 of the valve'body, and are guidedin their movements of operation through the valveseats 19 and 20 by means of guides 28 and 29 each consisting of aplurality of radially disposed arms having their free ends headed foraccurate contact with the walls of the bores of thevalve seats 19 and20. p

The upper ends of the valve rods or stems 25 and 26 pass throughstutfing boxes formed by cylindrical nipples 30 and 31; ris ing from theupper side of the top wall 27 for the reception of suitable packingplaced underdesired compression by packing glands 32 held in position bymeans of cap nuts 33 d. H

Similarly, the top wall 27 is formed to provide a pair of openingsnormally closed by screw plugs 35,'t hrough which, uponthe' removal ofthe latter, valve seats 36 and 37 are threaded downwardly of the portsformed inthe horizontal wall 15 and opening fromthe chambers 13 and 14into the lower exhaust chamber. 1 2, Cooperative withthe valve seats 36and 37 are upwardly opening valves 38' and 39, which are ten sioned innormally closed position by means of coil springs 40 and 11, which areengaged by vertically disposed valve rods or stems a2 and 13 with theirupper ends seated in inwardly opening bores formed in the screw plugs 35and their lower ends bearing against the upper sides of the valve.

The valve rods or stems 12 and 43 are projected outwardly of the screwplugs 35 and through stuffing boxes formed on the outer end walls of thelatter, and each of these stuffing boxes consists of a cylindricalnipple 41 1 for receiving a suitable packing material which is placedunder desired compression by means of a packing gland a5 held inposition by a cap nut 46. The lower ends of the valve rods or stems 42and 43 are projected downwardly through the valves 38 and 39, and intothe valve seats 36 for the reception thereon of a guide member 86,whereby the valves and 39 are accurately guided to and from the valveseats 36.

The admission valves 21 and 22 are operable through the medium of a pairof arms or levers 47 and 46, respectively, which are pivoted at theirouter ends on pivot pins 49 and 50, carried in bifurcated studs 51 and52 threaded into suitably formed openings in the top wall 27 of thevalve body casting, and are arranged to have the under faces of theirinner end portions resting on the upper free ends ofthe valve rods orstems 25 and 26. The upper sides of the inner end portions of these armsor levers 47 and d8 are bevelled as at 47 and 48 to provide cam likesurfaces to be acted upon in a manner to be hereinafter more fullyexplained, for the proper operation of the valves. Similarly, theexhaust valves 38 and 39 are operated through the medium of arms orlevers 53, which are pivoted on pivot pins 5% at their outer ends anddirectly to the bifurcated upper end portions 55 of the valve rods orstems 12 and 43, and at points intermediate their opposite ends on pivotpins 56 carried in bifurcated studs 57 threaded into suitable openingsformed in the top wall Y 7 of the valve body casting. These arms orlevers 53 are disposed at a slightly greater distance above the top wall27 than are the arms or levers 47 and as, and as consequence of sucharrangement, the inner ends of the same are formed to provide downwardlyand forwardly extending portions 58 having their upper faces bevelled asat 58 and correspondingly to the bevelled faces of the said arms l7 and48. These several arms or levers 47, 48 and 53 are arranged in pairs atthe opposite sides of the longitudinal center of the valve body, one ofthe arms or levers 53 being complemental to the arm or lever l7, and theother tothe arm or lever 48, while the bevelledend portions of each pairof the same are outwardly curved, but in a manner to have their freeends alined one with the other, which free ends are also curved orrounded off in a downward di rection.

Formed on the longitudinal center of the top wall 27 of the valve bodycasting is a substantially frusto-eonical bearing member 59, which hasits vertical transverse center disposed in a plane medially of thespaces between the opposed ends of the pairs of oppositely disposedvalve operating arms or levers, and mounted on this bearing member 59 isa cast member 60 formed to provide a pair of oppositely disposed andoutwardly inclined arms 61 and 62, which are normally disposed to havetheir outer inclined ends overlie the spaces between the adjacent endsof the said valve operating armsor levers 44 t8 and 53. This case member60 is pivoted for an oscillatory movement on the bearing member 59, bymeans of a shoulder pivot screw 63 threaded centrally into the upperflat face of the latter for the purpose. For the operation of the member60, the same is formed to provide an angularly disposed lug or ear 64 atone side thereof for the securing thereto of an arm 65, which isprovided with a hand grip 66 at its outer end. Projecting radially fromthe member 60, at a point diametrically opposite the lug or car 6%, is alocking lug 67, which is cooperative with a centrally disposed depression 68 formed in a resilient keeper 69, which is secured inposition on the top wall of the valve body by means of screws 69, andwhereby the member is maintained in its neutral or inoperative position.The undersides of the outer free end portions of the oppositely disposedarms 61 and 62 of the member 60, are oppositely bevelled for cooperationwith the correspondingly bevelled upper faces of the arms or levers 47,d8 and 53, for the operation of the several valves 21, 22, 38 and 39 inaccordance with the movements imparted to the member 60 from the handlever 65.

In the use of the control valve thus provided, the admission chamber 11will have its inlet connected by a pipe 70 to a suitable source of fluidsupply (not shown), and the upper chambers by means of the pipes 71 and72 to the opposite ends of a hydraulic cylinder or the like containing adouble acting piston, or to a double hydraulic cylinder constructionhaving a single acting piston in each cylinder,while the exhaust chamber12 will have its outlet connected to an exhaust pipe 73. With the valvebody thus connected, the admission chamber 11 will be filled at alltimes, and upon the manipulation of the hand arm'or lever 65, as forinstance to the left, Figure 2, the arm 61 of the operating member 60will move into engagement with the inclined face of the arm or lever 53and in a manner to start the opening movement of the exhaust valve 38 inadvance of the arm 63 moving into engagement with the inclined face ofthe arm 48 for effecting the opening movement of the admission valve 22at the opposite side of the valve body. Similarly, when the hand leveror arm 65 is swung to the right, Figure 2, the arm 62 will move intoengagement with the other of the exhaust valve actuating arms or levers53 in advance of the arm 61 acting to depress the actuating arm 47 forthe opening of the admission valve 21.

From the foregoing, it will be readily apparent that, while a preferredembodiment of the device has been described and illustrated herein inspecific terms and details of construction, arrangement and operation,various changes in and modifications of the same may be resorted towithout departing from the spirit of the invention, or the scope of theclaims appended hereto.

Having thus fully described the invention, what is claimed, is

1. A hydraulic controlling valve mechanism comprising an admissionvalve, an exhaust valve complemental to said admission valve, a valvestem for each of said valves, pivoted cam levers for shifting saidvalves to open position, said levers acting on said stems, the pivot ofone of said levers arranged at one end thereof and the pivot of theother of said levers positioned intermediate the ends thereof, one ofsaid levers having one end connected with one of said stems and theother of said levers seating intermediate its ends on the other of saidstems, and a manually operated pivoted actuating member common to andalternately riding on the inner terminal portions of said levers foractuating them to open said valves.

2. A hydraulic controlling valve mechanism comprising an admissionvalve, an exhaust valve complemental to said admission valve, a valvestem for each of said valves, pivoted cam levers for shifting saidvalves to open position, said levers acting on said stems, the pivot ofone of said levers arranged at one end thereof and the pivot of theother of said levers positioned intermediate the ends thereof, one ofsaid to actuate the cam levers.

8. A hydraulic controlling valve mechanism comprising two pair ofcomplementally arranged admission and exhaust valves, two pair of leversfor operating said valves, said levers mounted on horizontally disposedpivots, one of the levers of each pair of levers loosely connected atone end to the upper end of the stem of one of the valves of a pair andthe other lever of said pair of levers seating on the upper end of thestem of theother valve of said pair, an actuating member mounted on avertical pivot andprovided with a pair of oppositely extending arms eachcommon to a pair of levers for alternately actuating the same, saidmember providing means for alternately actuating one of said exhaustvalves and the complemental admission valve to open position, the leversfor the exhaust valves being arranged above the admission valves toprovide for the operation of the first mentioned levers in advance ofthe operation of the second mentioned levers, and meansfor normallyretaining said member in its normally inoperative position.

In testimony whereof, I aflix my signature hereto.

JOHN E. MILLARD.

